FastReport 增加二维码支持(含源代码)

{ 工作中遇到这样的需求，苦苦找不到相关的代码，找到一个还是收费的！：（ 本着共享互惠的精神，本人简单实现了一个 FastReport 打印二维码的应用。 使用方法非常简单，将压缩包中的 frx2DBarcode 单元添加到引用即可在报表设计中看到 2D 条码对象，进行设计、打印。 目前仅实现了 QRCcode 的打印，抛砖引玉，相信增加 PDF417，DM 编码应该不会太难。 如果对源代码做了改进和修改欢迎 EMAIL 给我一份，学习一下！ 邮件： JulyXDay@QQ.COM 谢谢支持！ } {******************************************} { } { FastReport v4.0 } { 2DBarcode object } { } { Copyright (c) 2012 } { by LiKejian } { QQ 39839655 } { } {******************************************} unit frx2DBarcode; interface {$I frx.inc} uses Windows, Messages, SysUtils, Classes, Graphics, frxClass {$IFDEF Delphi6} , Variants {$ENDIF}; type TfrxBarcode2DObject = class(TComponent); // fake component TfrxBarcode2DView = class(TfrxView) private FEccLevel: SmallInt; FModule: SmallInt; FVersion: SmallInt; FText: String; FExpression: String; public constructor Create(AOwner: TComponent); override; procedure Draw(Canvas: TCanvas; ScaleX, ScaleY, OffsetX, OffsetY: Extended); override; class function GetDescription: String; override; procedure GetData; override; published property Version: SmallInt read FVersion write FVersion default 0; property EccLevel: SmallInt read FEccLevel write FEccLevel default 0; property Module: SmallInt read FModule write FModule default 0; property DataField; property DataSet; property DataSetName; property Expression: String read FExpression write FExpression; property Frame; property Text: String read FText write FText; end; implementation uses frx2DBarcodeRTTI, frxDsgnIntf, frxRes, frxUtils, uQRCode; constructor TfrxBarcode2DView.Create(AOwner: TComponent); begin inherited; end; class function TfrxBarcode2DView.GetDescription: String; begin Result := '2D 条形码对象'; end; procedure TfrxBarcode2DView.Draw(Canvas: TCanvas; ScaleX, ScaleY, OffsetX, OffsetY: Extended); const sFileName = 'QRCode.bmp'; var oBmp: TBitmap; begin BeginDraw(Canvas, ScaleX, ScaleY, OffsetX, OffsetY); //Create 2D Barcode CreateQRCode(FText, FVersion, FEccLevel, FModule); if FileExists(sFileName) then begin oBmp := TBitmap.Create; oBmp.LoadFromFile(sFileName); frxDrawGraphic(Canvas, Rect(FX, FY, FX1, FY1), oBmp, IsPrinting, False, False, 0); FreeAndNil(oBmp); end; DrawFrame; end; procedure TfrxBarcode2DView.GetData; begin inherited; if IsDataField then FText := VarToStr(DataSet.Value[DataField]) else if FExpression <> '' then FText := VarToStr(Report.Calc(FExpression)); end; initialization frxObjects.RegisterObject1(TfrxBarcode2DView, nil, '', '', 0, 23); finalization frxObjects.UnRegister(TfrxBarcode2DView); end.